A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.
NSN 4140-01-393-3015
NSN 6320-01-039-5891
NSN 6620-01-351-6870
NSN 6220-01-220-8088
NSN 6685-01-441-7568
NSN 5920-00-152-4003
NSN 5996-00-102-5425
NSN 6130-00-511-5568
NSN 5990-00-269-2226
NSN 6645-00-959-6502
NSN 5855-00-991-0096
NSN 5996-01-386-2843